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+dlg(1) PCCTS Manual Pages dlg(1)
+
+
+
+NAME
+ dlg - DFA Lexical Analyzer Generator
+
+SYNTAX
+ dlg [_o_p_t_i_o_n_s] _l_e_x_i_c_a_l__s_p_e_c [_o_u_t_p_u_t__f_i_l_e]
+
+DESCRIPTION
+ dlg is a tool that produces fast deterministic finite auto-
+ mata for recognizing regular expressions in input.
+
+OPTIONS
+ -CC Generate C++ output. The _o_u_t_p_u_t__f_i_l_e is not specified
+ in this case.
+
+ -C[ level]
+ Where level is the compression level used. 0 indica-
+ tions no compression, 1 removes all unused characters
+ from the transition from table, and 2 maps equivalent
+ characters into the same character classes. It is sug-
+ gested that level -C2 is used, since it will signifi-
+ cantly reduce the size of the dfa produced for lexical
+ analyzer.
+
+ -m Produces the header file for the lexical mode with a
+ name other than the default name of "mode.h".
+
+ -i An interactive, or as interactive as possible, parser
+ is produced. A character is only obtained when
+ required to decide which state to go to. Some care
+ must be taken to obtain accept states that do not
+ require look ahead at the next character to determine
+ if that is the stop state. Any regular expression with
+ a Kleene closure at the end is guaranteed to require
+ another character of look ahead.
+
+ -cl class
+ Specify a class name for DLG to generate. The default
+ is DLGLexer.
+
+ -ci The automaton will treat upper and lower case charac-
+ ters identically. This is accomplished in the automa-
+ ton; the characters in the lexical buffer are unmodi-
+ fied.
+
+ -cs Upper and lower case characters are treated as dis-
+ tinct. This is the default.
+
+ -o dir
+ Directory where output files should go (default=".").
+ This is very nice for keeping the source directory
+ clear of ANTLR and DLG spawn.
+
+ -Wambiguity
+ Warns if more than one regular expression could match
+ the same character sequence. The warnings give the
+ numbers of the expressions in the dlg lexical specifi-
+ cation file. The numbering of the expressions starts
+ at one. Multiple warnings may be print for the same
+ expressions.
+
+ - Used in place of file names to get input from standard
+ in or send output to standard out.
+
+SPECIAL CONSIDERATIONS
+ _D_l_g works... we think. There is no implicit guarantee of
+ anything. We reserve no legal rights to the software known
+ as the Purdue Compiler Construction Tool Set (PCCTS) - PCCTS
+ is in the public domain. An individual or company may do
+ whatever they wish with source code distributed with PCCTS
+ or the code generated by PCCTS, including the incorporation
+ of PCCTS, or its output, into commercial software. We
+ encourage users to develop software with PCCTS. However, we
+ do ask that credit is given to us for developing PCCTS. By
+ "credit", we mean that if you incorporate our source code
+ into one of your programs (commercial product, research pro-
+ ject, or otherwise) that you acknowledge this fact somewhere
+ in the documentation, research report, etc... If you like
+ PCCTS and have developed a nice tool with the output, please
+ mention that you developed it using PCCTS. As long as these
+ guidelines are followed, we expect to continue enhancing
+ this system and expect to make other tools available as they
+ are completed.
+
+FILES
+ mode.h , dlgauto.h , dlgdef.h
+
+SEE ALSO
+ antlr(1), pccts(1)
+
+BUGS
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